Flexible bag



FIG. 1 is a top perspective view of the flexible bag;

FIG. 2 is a another top perspective view of the flexible bag;

FIG. 3 is a top view of the flexible bag;

FIG. 4 is a bottom view of the flexible bag;

FIG. 5 is a left side view of the flexible bag;

FIG. 6 is a right side view of the flexible bag;

FIG. 7 is a front side view of the flexible bag; and,

FIG. 8 is a back side view of the flexible bag.

The broken lines shown in FIGS. 1-4 represent perforations that are part of the claimed design. 

The ornamental design for a flexible bag, as shown and described. 